Donald,
Thanks so much for your advice. My doors look exactly like your’s, but they are either wood or some sort of pressed fiber material. I am now convinced that I do not need operational hinges as I prefer open doors in order to view the engines. By the way, I also had to deal with warped walls. One of the large sidewall sections was warped inward about 1/4” and a back wall section warped as well. Had to clamp a stiff board to the sidewall section to hold it true while using hot glue. However, hot glue could not hold it, so I reclamped it, used Gorilla glue, and placed support beams across side to side. So far, that is holding. Warped back wall section remains warped as I found no way to clamp it. The warped sections prevented me from assembling a perfectly symmetrical RH.